class_docstr: Named entity.
class_docstr_tok: ["Named","entity","."]
code: def test_named_entities(self):
      s = pd.Series("New York is a big city")
      s_true = pd.Series([[("New York", "GPE", 0, 8)]])
      self.assertEqual(nlp.named_entities(s), s_true)
  
file_path: texthero/tests/test_nlp.py
imports: import pandas
  import numpy
  from texthero import nlp
  from .None import PandasTestCase
  import doctest
  import unittest
  import string
label_desc: Use image node_id 1 for calling the TestNLP obj's underlying member method code with example usage: obj.test_named_entities() without return types